It is installed between the engine block and the oil pan. It prevents lubricating oil from leaking out and dust or contaminants from entering the lower part of the engine.
For the L10 engine, the Mechanical, CELECT, and Gas versions are listed. Compatibility with other engines, such as the M11, ISM, and QSM, must be verified using the engine serial number (ESN), as different oil pans may be used.
This is a standard (STD) engine piston kit used primarily on Cummins ISL/QSL 8.9–9.0 L engines, featuring a two-piece piston. The kit is installed inside the cylinder block, connected to the connecting rod via the piston pin. Its function is to absorb the pressure generated by combustion, transfer the force to the connecting rod and then to the crankshaft, seal the combustion chamber via the piston rings, control oil consumption, and transfer part of the heat from the piston to the cylinder liner and the cooling/lubrication system.
It is always a good idea to check the ESN (Engine Serial Number), CPL, the Cummins QuickServe/OEM catalog, engine model, horsepower/rating, piston type (1-piece vs. 2-piece), the number stamped on the cylinder head, and the dimensional comparison.
Rear end of the crankshaft, flywheel side; Rear oil seal with wear ring, prevents oil leakage between the crankshaft and the flywheel housing, For certain L10, M11, ISM11, and QSM11 engines, depending on the engine configuration. Dry-clutch application, Non-REPTO.
Final compatibility must be verified using the engine serial number, because the same M11/ISM model may use a different oil seal depending on the flywheel, clutch, and REPTO configuration.